2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/159696A simple model of species origin resulted from dynamic features of a population, solely, is developed. The model is based on the evolution optimality in space distribution, and the selection is gone over the mobility. Some biological issues are discussed.4 pages, 4 figuresPopulations and EvolutionOther Quantitative Biologytext